What is atomized Copper Powder?
The atomized aluminum powder can be further processed with electrolytic copper. It is a light reddendritic powder that is irregularly packed and spherical. It can be easily oxidized in humid air. Good formability, low bulk density and long storage times. Uses: This powder is used extensively in powder metallurgy products and friction materials. The bulk density of spherical or spherical copper is high. It is widely used in electronic materials, injection molding and welding materials.
Production of atomized copper powder
Electrolytic copper plate-smelting-water (gas) atomization-vacuum drying-high temperature oxidation-crushing-reduction-crushing-classification
Smelt
Controlling the impurities during the copper melting process is essential to ensure the finished powder has good fluidity.
Conductivity.
Heat to 1150-1200degC with an intermediate frequency furnace (or electric arc oven) is the normal operation. The most important process prior to atomization is smelting. It is possible to control the copper smelting process and reduce the bulk density.
Atomization
There are two main types of industrialized production methods for atomized copper powder: the gas atomization process and the water atomization technique. There is a difference in the atomizing media used, but the principle behind making powder is the exact same. You can divide it into argon atomization or air atomization depending on the gas media. To obtain finer powder, supersonic Atomization is also used.
Production practice has proven that water atomization works better than gas. Water atomization takes place in inert or air.
Reduce
The reduction process is quite simple. It takes 60 to 120 minutes, and the temperature reduces between 400 and 600. One part of the oxygen is oxidized onto the surface of the particles, while the other part becomes copper dioxide and penetrates the interior of the particles. It is necessary to reduce the temperature very high in order to remove oxygen. Copper will naturally sintered under this temperature condition. This requires grinding large amounts of sintered block. The new water mist method for oxidation does not require the reduction step. This speeds up the process and saves you energy.
Antioxidant treatment
Thermodynamically, copper is unstable in air. Copper powder will eventually oxidize in the atmosphere, especially in humid environments. Copper powder’s surface absorbs water vapor in the ambient air to form a water layer. Because of the thick water film on the surface of the particles there is very little oxygen infiltration. The oxygen concentration is also low. A micro-anode forms in the convex areas where oxygen is easy reach. The copper powder exhibits a low concentration. Due to the battery effect, copper powder gradually oxidizes. After being treated using antioxidants, the copper powder’s surface gets adsorbed onto a film layer. This provides an anti-oxidation effect which can increase the service life. Benzotriazole and soap liquid (BTA), gelatin, and protein Hydrolyzate all have corrosion inhibitor effects on water atomized from copper powder.
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